Pope Leo XIII's Arcanum [excerpts]

Pope Leo XIII

• "29. Truly, it is hardly possible to describe how great are the evils that flow from divorce. Matrimonial contracts are by it made variable; mutual kindness is weakened; deplorable inducements to unfaithfulness are supplied; harm is done to the education and training of children; occasion is afforded for the breaking up of homes; the seeds of dissension are sown among families; the dignity of womanhood is lessened and brought low, and women run the risk of being deserted after having ministered to the pleasures of men. Since, then, nothing has such power to lay waste families and destroy the mainstay of kingdoms as the corruption of morals, it is easily seen that divorces are in the highest degree hostile to the prosperity of families and States....
• "34....the supreme pontiffs have resisted the most powerful...rulers, in their threatening demands that divorces...be confirmed by the Church...[they] have been contending for the safety, not only of religion, but also of the human race. For this reason all generations of men will admire the proofs of unbending courage which are to be found in the decrees of ....[e.g.,] Clement VII and Paul III against Henry VIII....all rulers and administrators of the State who are desirous of following the dictates of reason and wisdom, and anxious for the good of their people, ought to make up their minds to keep the holy laws of marriage intact....
• "41....no power can dissolve the bond of Christian marriage whenever this has been ratified and consummated; and that, of a consequence, those husbands and wives are guilty of a manifest crime who plan, for whatever reason, to be united in a second marriage before the first one has been ended by death. When, indeed, matters have come to such a pitch that it seems impossible for them to live together any longer, then the Church allows them to live apart, and strives at the same time to soften the evils of this separation by such remedies and helps as are suited to their condition; yet she never ceases to endeavor to bring about a reconciliation....  
• "44....We commend, venerable brothers, to your fidelity and piety those unhappy persons who, carried away by the heat of passion, and being utterly indifferent to their salvation, live wickedly together without the bond of lawful marriage. Let your utmost care be exercised in bringing such persons back to their duty; and, both by your own efforts and by those of good men who will consent to help you, strive by every means that they may see how wrongly they have acted; that they may do penance; and that they may be induced to enter into a lawful marriage according to the Catholic rite.   
• "45. You will at once see, venerable brothers, that the doctrine and precepts in relation to Christian marriage, which We have thought good to communicate to you in this letter, tend no less to the preservation of civil society than to the everlasting salvation of souls" (Pope Leo XIII, Arcanum, 2/10/1880).